(UTC - 08:00) Pacific Time (US & Canada)

Monday, May 18

6:00am Annihilator's Apparition
7:00pm In The Driving Rain 3
9:00pm Annihilator's Apparition

Tuesday, May 19

5:00am Raging Dark Arms
7:00am In The Driving Rain 3

(UTC - 08:00) Pacific Time (US & Canada)

Monday, May 11

5:00am Annihilator's Apparition
7:00am Wild Easter 2
8:00am Wild Easter 2 Boost Day (cont.)
7:00pm Annihilator's Apparition
9:00pm Wild Easter 2

Tuesday, May 12

4:00am Ebon-Winged Vanguard
6:00am Wild Easter 2

Wednesday, May 13

5:00am In The Driving Rain 3
9:00pm Annihilator's Apparition
11:00pm Raging Dark Arms
Thursday, May 14

6:00am In The Driving Rain 3
8:00am Advance Quest Boost Day
9:00pm Mining Base Defense
11:00pm Beckoning Darkness
Friday, May 15

7:00am In The Driving Rain 3
7:00pm Ebon-Winged Vanguard
9:00pm Mining Base Despair

Saturday, May 16

4:00am Annihilator's Apparition
6:00am In The Driving Rain 3: Ship 1 ~ 5
7:00am In The Driving Rain 3: Ship 6 ~ 10
9:00pm In The Driving Rain 3
11:30pm Enemy Defeat Ranking: Spardan A

Sunday, May 17

» 12:30am Enemy Defeat Ranking: Spardan A
12:00am Desert Guerillas
2:00am In The Driving Rain 3
5:00am Mining Base Defense: Ship 6 ~ 10
6:00am Mining Base Defense: Ship 1 ~ 5
7:00pm Beckoning Darkness
9:00pm In The Driving Rain 3

(UTC - 08:00) Pacific Time (US & Canada)

5:00am In The Driving Rain 3
9:00pm Annihilator's Apparition
11:00pm Raging Dark Arms

May 13th Maintenance
•5/13/2015 @ 11:00 ~ 17:00 JST
•5/12/2015 @ 10:00 PM ~ 4:00 AM EDT

PSO2es Maintenance
•5/13/2015 @ 10:00 ~ 17:30 JST
•5/12/2015 @ 9:00 PM ~ 4:30 AM EDT

May 13th Patch
•Launcher: Version 03.00.02
•Client: ver. 3.0501.2
•Patch Size: 24 MB (PC) / 23 MB (Vita)

NEW [In The Driving Rain] Emergency Quest. After Maintenance!

Source:
http://www.bumped.org/psublog/pso2-jp-maintenance-and-patch-5132015/

BOOO BOOOO~!!~!~~~!

May 7th Maintenance

5/7/2015 @ 11:00 ~ 17:00 JST
5/6/2015 @ 10:00 PM ~ 4:00 AM EDT

PSO2es Maintenance

5/7/2015 @ 10:00 ~ 17:30 JST
5/6/2015 @ 9:00 PM ~ 4:30 AM EDT